Hierarchical Fair Service Curve
- Hierarchical Fair Service Curve
Hierarchical Fair Service Curve (HFSC) is based on a QoS and a CBQ algorithm which is used mostly on Unix operating systems. It is the first QoS algorithm to simultaneously support all three of real-time, adaptive best-effort, and link-sharing services.
Also used in NetBSD 1.2D, FreeBSD 2.2.6 and OpenBSD 1.6; and the router firmware DD-WRT.
See also
* L7-filter
* Real-time Transport Protocol
* Class Based Queueing
* Hierarchical token bucket (HTB)
External links
* [http://www.cs.cmu.edu/~hzhang/HFSC/main.html Hierarchical Packet Schedulers]
* [http://linux-ip.net/articles/hfsc.en/ HFSC Scheduling with Linux]
* [http://automatthias.wordpress.com/2006/06/30/hfsc-and-voip/ HFSC and VoIP « Maciej Bliziński]
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